Flexible handle-pull for calculators.



W. R. DE CAMP.

FLEXIBLE HANDLE PULL FOH CALCULATORS.

APFLCATIUN FILED 0CT.6.19I5.

Patented July 3, 1917.

2 SHEETS-SHEET l.

lll/ lll Il f lia-ull kl R. De Camp.

351g attozwz 'W. R. DE CAMP.

FLEXIBLE HANDLE PULL FOR CALCULATORS.

AYPLICATION FILED OCT. 6. 1915.

Patentd July 3, 1917.

2 SHEETS-SHEET 2.

Camp.

W. K. De

lIl

NTTED STATES PATENT OFFICE.

WITSEL R. DE CAMP, 0F ROSEL-ANI), NEW JERSEY, l'ASIG-NOR TO -ADDOMETER COR- PoRA'rIoN, or NEW YORK, N. Y.,

:A CORPORATION OF DELAWARE.

FLEXIBLE HANDLE-PULL FOR CALCULATORS Application le'd October 6, 1915.

To all whom zt may concern.'

Be it known that I, WrrsEL R. DE CAMP, a citizen of the United States, and a. resident of Roseland, Yin the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Flexible Handle-Pulls for Calculators, of which the following is a specification.

The object of the present invention 1s to provide an improved ,construction in a de vice known as a flexible handle pull, employed in calculators and similar machines. Such mechanism is .designed to permit ,the yielding effect when the handle of such ma chine is given an unusually rapid pull, whereby the parts of the mechanism are not forced to operate with the same speed as thatv of the handle, but can lag behind, and the force exerted in this forward pull is stored up; permitting and insuring that the Several parts have their complete movement.

The present invention includes mechanism whereby the pitmen or side bars of the .machine are caused to have a supplemental movement, both prior to the movement of the universal bar on the initial movement of the handle, 4and subsequent to the final movement of the universal bar toits normal position.

A further object of this invention is to provide means for preventing undue vibration of the parts associated with the universal bar, by reason of one set of springs overhalancing another set of springs.

In the drawings showing one embodiment of mv invention. Figure l is a side elevation. Fig. 2 is a horizontal section on the line 9--2 of Fig. 1 Fig. 3 is a partial view from the opposite side from that of Fig. 1. at the rear of the machine. Fig. i shows the controlling eam. Fig. 5 is a view similar to Fig. 1 showing the parts in initial advanced position. Fig. 6 is a similar view with the handle shaft full)7 advanced, and the pitman somewhat retarded. Fig. 7 shows the connecting Abar between the handle and pitman. Fig. 'S shows the frame connected with the main springs. Fig. 9 is a partial view with the handle shaft and pitman in fully advanced position; and Fig. 10 is a. partial view showing the latch and coperating parts on partial return of the pitman and other parts, and Fig. ll is a plan view of the handle and main shafts.

In the dra-wings a crank 9., on the Specicationof Letters Patent vPatented July 3, 1917.

serial No. 54,313.

main or forward operating shaft 40 of the machine (not shown) is directly pivoted to a ,pitxnan 3. The pitman extends rearwardly and 'connects with a crank 4; fast on the main shaft 5 that swings in side plate 1, and extends across the machine. This shaft 5 is connected with a member known asthe uni versal bar, that serves Ato return the rack and type plates to normal position after they have been advanced. In Fig. '1 is indicated a rack and type pla-te 6, that when released is elevated byra spring it beingunderstood that there is a set of such members, one for each bank of keys of the machine. Fast to :the sha ft are a pair of arms 8, one only .being indicated and these arms carry the universal bar In the. normal 4position of the shaft as indicated in Fig. 1, the `bar 9 holds the rack and type plates depressed with their springs tensioned, and when the shaft 5 rocks to raise the universal bar, the rack and type plates will rise, unless otherwise restrained. This part of the adding machine is described merely to indicate that there is a pressure on the shaft 5 and crank 4 tending to rock this crank forward.

The connection between the crank 4 and the pitman '3 is not direct, but a pin 10 fast on the crank 5 moves in a short slot 1.1 in the pitman 3. giving the pi'tman a limited movement relative to the crank 4. On the opposite side ofthe machine the shaft 5 carries a crank 1i (see Fig. 3') provided with a pin 13 that has a short movement in a slot 14 in the end portion of the pitman l5. on this side oit the machine; which pitman corresponds to the pitman 3. The .pitman 1T is connected with the shaft 40 at the front 'h v a crank (not shown) similar to the crank Q whereby these pitmen will move hack and forth in unison. The movement of these pitmen relative to that of the cranks 1Q and 4, is somewlnit controlled by a cam plate 1.6 that swings on -a pivot 17. on the side plate 18, at the left side of the machine. rThis cam plate has a slotted portion 19 in which moves a stud 2O .fast on the pitman 15, wherehy the n'iovelncnt of the pitman back and forth will swing the cam plate, from the position shown in full lines, to that indicated in broken lines, in Fig. 3. In the normal position as shown, the cam plate has its edge portion 21 engaging the crank pin 1?, and this edge portion is arranged concentric with the pivot .17 of the cam plate,

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while the adjacent portion 22 of the curved edge of the cam is eccentric and approaches the pivot 17 as the curve continues. From this it follows that the initial swing of the cam by the pitman 15, will prevent forward movement of the crank pin 13 by reason of the concentric curved edge 21 engaging the crank pin. But the continued swing of the cam will bring the eccentric edge 22 opposite the crank pin 13, that will permit the forward swing of the crank 12. This will result in the pin 13 of the pitman moving to the other end of the slot 14 While the concentric edge engages the crank pin and holds the crank stationary; and thereupon, the eccentric curved edge will permit the advance of the crank with the pitman by engaging the rear end of the slot 14.

The machine is operated by a handle 23 fast to a spindle 24 that rocks in a bearing 25. To this spindle is secured a segment 26. The function of this segment is that of the usual full stroke compelling device common in this class of machines. The segment has a notched periphery coperating with a reversing pawl 28, that is controlled by a spring lever 29. This reversing pawl prevents return movement of the segment and handle after initial movement, until the end of the stroke, when the pawl is reversed. And the pawl thereupon prevents reverse movement of 'the handle when it begins the return stroke, until the return stroke is completed. It is to be understood that this handle and spindle 24 is not connected with the front shaft except through mech'a.- nism hereinafter set forth.

A bar 30 (see Fig. 7) has one end pivoted on the segment 26 to be moved back and forth by the handle. The rear end of the bar 30 is connected by one or more sprin 3l with the pitman 3, by pins 42, and t lese springs are held under tension by reason of a pin 32 on the pi'tman 3, extending into a slot 33 in the bar 30, the springs holding the pin normally7 against the for- Ward end of the slot, as shown in Fi s. 1 and 5. By this means when the hand e is drawn forward to swing the segment 26, the bar 30 will draw the pitman 3 forward through the springs 31, and under normal conditions these springs will not stretch; but if the handle is drawn rapidly to its forward position, the springs will yield to the resistance of the crank 4 and springs 7 controlling the rack and type plates 6, and the pitman 3 will advance later than the bar 30, and hence the pin 32 will move back in the slot 33.l as indicated in Fig. 6.

The rear end of the bar 30 contains a slot 35 in which slides a stud 367 fast to one end portion 37 of a plate or frame 38, shown a sliding movement on 'the crank pin, the plate being guided by the head on the crank pin 10. The plate 38 has an open portion 41, being in the form of a frame, so that springs 3l can freely operate upon the studs 42 on the pitman 3. This plate 38 is shown as provided with extensions 43 and 44 to which are secured the main springs 45 and 46 of the machine; the 'rear ends of these springs being secured to studs 47 and 48 on the side plate 1. These springs will draw the plate 38 rearwardly, and its slotted rear end 39 will engage the crank pin 10 and move the crank to the limit of its rearward position, that may be limited by the base or other member that is engaged by the universal bar 9. The bar 30 is shown provided with a pair of arms 50 and 51, that carry springs 52 and 53 extending rearward and connected with the end member 37 of the plate 38. But these springs are weak in their operation compared with the springs 31 connecting the pitman and bar 30.

Means are provided for engaging and locking the handle or the segment plate 26, or parts directly connected therewith, when the handle is pulled to the limit of its forward position. As shown I provide a latching device in 'the form of a lever 54 pivoted on the side plate 1 and normally pressed by a spring 55 against a pin 56 on the side plate. The front end of the latch 54 carries a pawl 57 that is normally held in the position shown in Fig. 1 by a spring 58 permitting movement of the pawl in both di* rections from this posit-ion. When 'the segment 26 is moved forward by the handle, an arm 59 on the segment will strike the pawl and trip it to move past the nawl,and in the final forward position of the segment the pawl will engage a shoulder 60 on the segment, as indicated in Figs. 6 and 9. The lever 54 is normally locked in the position shown in Fig. 1 by a lever 61 oted on the side plate 1 at 62, a shoulder 63 on the lever 61 being pressed against the rear end of lever 54 by a spring 64. The lever has its lower end in position to be engaged by a pin 65 on the pitlnan 3 at the conclusion of its forward stroke, whereby 'the lever 61 will be swung to release the lever 54, as indica-ted in Fig. 9; and on return of the pitman the spring 64 will retract the lever 61 to rengage the lever 54. The specific operation of the latch is that it will serve to hold the segment 26 locked in forward' position as long as 'the lever 61 re tains the lever 54 in normal position. When the handle is drawn forward and the segment 26 is rocked to the position shown in Figs. 6 and 9, the pawl 57 will engage the shoulder 60 of the segment. The release of the handle will permit the several parts to return lthe segment 26 to former position. The rearward pressure of the shoulder 60 on the pawl 57, will tend to rock the lever 54 to swing the pawl end of the lever upwardly, for the reason that the place of engagement of the shoulder and pawl is below a line passing through the axis of the pawl and the axis of the lever 54:. This would tend to move the rear end of the lever 54 downwardly, and the pawl will swing on its pivot during such movement of the lever and segment, as indicated in Fig. 10. But this is supposing that the lever 61 has been engaged by the pin 65 on the pitman 3 and swung rearward free from the lever 54, as indicated in Figs. 9 and 10. In Fig. 6 it will be noticed that the lever 61 has not been shifted from normal position, and hence the segment E26 is locked in the forward position, because thc lever 54 cannot swing to permit the turning of the pawl to release the segment.

The operation of these parts is as follows :--'l`he main springs 45, 46, always eX- ert a rearward draft on the plate 38, and in its normal position, this plate engaging the crank pin 10, holds the crank and shaft 5 at the limit of. its movement. The springs 3.1 between the bar 30 and the pitman 3, retain these members with the pin 32 engaging the forward end of the slot 33 in the bar. The springs 52 and 53, that are tensioned between thc arms on the bar 30 and the plate 38, since they are much weaker than the main springs 45, 46, will draw the bar 30 rearward. The bar 30 being connected with the pitman 3 through the springs 31. the bar and pitman will be both moved rearward until the pitman has the forward end of its slot 11 engaged by the crank pin 10, that will limit the rearward movement l, of the pitman. The connection between the bar 30 and the plate 38, by stud 36 on the plate riding in slot 35 on the bar, is so .arranged that in the described position of the parts,l this stud is at the forward portion of the slot 35.

Upon drawing the handle and segment plate 26 forward from the normal position, by a. slow movement, the bar 30 will be carried forward. The springs 31 connecting the bar 30 with the pitman 3, will cause the bar and pitman to move forward in unison, and the bar 30 at this initial movement will draw forward on the light springs 52 and 53; but the latter connecting with the plate 38, will not advance this plate because of the much greater opposed tension of the main springs a5 and 46, see Fig. 5). Hence the.` plate 38 and stud 36 will remain stationary until the slot 35 in the bar 30 moves on the stud and its rear end engages the stud, whereupon the bar 30 will from this time forward cause the plate 38 to move ahead in unison therewith. But the initial movement of the bar 30 and pitman since the plate 38 holds the crank pin l() in its rear position at such time, will cause the movement of the slotted end 11 of the pitman on the crank pin l0. This movement of the crank pin l0 in the slot 11 is identical with that of the stud 36 in the slot 35; whereupon as soon as the bar 30 has advanced suliicient to carry the plate 38 ahead with it, the pitman 3 will have advanced its slot suliicient to engage the crank pin, and cause the crank 4 to be advanced by the pitman. This will have the effect of causing the slotted end 39 of the plate 38 to advance in unison with the forward movement of the crank pin 10 that rides in such slot. These several parts will continue their forward movement in unison to the end of the stroke. When the handle is released, the springs 45, 46 will return the parts in the same relative positions in which they advanced after the said initial movement; until the crank 4. reaches the limit of its return movement, that will arrest the rearward movement of the plate 38. But the tension of the springs 52, 53. will draw rearward on the bar 30, that will cause its rear slotted end 35 to move rearward on the stud 36. And it will be understood that the pitman 3 will. partake of this additional rearward movement of the bar 30, so that the pitman willV have a rearward movement and its slotted end 11 will move to the rear on the crank pin. 10, that will bring these parts to their former positions.

1When thc handle and bar 30 are drawn forward rapidly, the resistance of the parts connected with the shaft 5, (especially when a retarding means such as a dash-pot is employed) will cause the bar 30 to advance faster than thc movement of the pitman 3; which is permitted by the stretching of the springs 31 connecting the bar 30 and the pitman. But it is to be understood that the initial movement of the bar 30 will cause the pitman 3 to move in unison therewith until the crank pin 10 reaches the other end of the slot 11 in the pitman 3, that will serve to retard. the advance of the pitman, after it and the bar have made this initial, movement' in unison. (see Fig. 6.) The further adr-ance of the bar 30. as stated, will stretch the .s1-)rings but the plate 38 after the said initial. movement will he carried along with the bar 30 by the stud 36. Hence the plate 38 will more forward while the crank pin 10 will have a retarded movement, causing a rearward movement of the crank pin relative to the slotted end 39 of the plate. as indicated in Fig. 6. This view also shows the .relative rearward movement of the pin 32 in the slot 35, b v reason of the pitman 3 advancing slower than the. har 30. 5001i as the handle and bar 30 reach the limit. of the forward position, the latch pawl 57 will engage the shoulder 60 on the segment 26, and lock the bar 30 in the forward position. The plate 38 will also be locked in this forward position, but the now extended springs J1 will cause the further advance of the pitman 3 for the limit of its forward movement, that will insure the full movement of the crank el. and connected parts. The pitman 3 will move forward until the stud reaches the end of the slot 33, during which movement pin G5 will strike the lever G1 and shift it to release the lever 54, as shown in Fig. 9. This will release the bar 30 andconnected parts, that will return to their normal positions, as has been Set forth.

In regard to the function and operation of the cam plate 1G, it will be seen that during the initial advance of the pitman 3, and that of the pitman 15 in unison therewith, as has been set forth herein, (see Fig. 3), while the pitmen travel the length of their slotted port-ions on the crank pins without advancing the crank pins, the cam is swung on its pivot 17, by reason of the stud 20 on the pitman 3 engaging the slotted portion 19 of the cam, whereby the concentric curved portion 21 travels along the adjacent crank pin 18. But the cam does not resist the advance of the crank 12, at this time, for the reason that the main springs 45, 4:6, since the Vplate 38 is not now advanced, draw this plate rearward, and the crank 10 is retained in the rearwardposition by the end of the slotted portion 39 in the plate 38. As before stated, there isa draft on the shaft 5 tending to swing the cranks 4 and 12 forwardly, b v reason of' tension exerted on the universal bar 9 by the springs 7 that elevate the rack and type plates 6: but the aggregate draft of these springs is much less than the tension of the main springs 45, 46, and hence this cam plate is not required to overcome any normal tendency of the cranks to move forward. The subsequent advance of the bar 30 and the pitman will. as has been set forth, causel the advance of the plate 3S, and the crank pins 10 and 13 will, now move forward in unison with their respective pitmen. The eccentric curved edge Q2 of the cam plate is so timed and constructed that the further swing of the cam plate by the pitman 15 will permit the advance of the crank pin 153 in close proximityr to this edge, without any interference. But, it has been found in the use of the machine, that without this cam plate, or a structure having a similar func tion, this over-balancing effect, of the main springs 45, 46, relative to the said springs connected with the rack and tyne plates, has a tendency to produce a kind of vibration of the cranks 12 and 4, and connected parts that interferes with the desired smooth operation of the machine, especially when it is working under considerable speed. On the return stroke of the pitmen and other parts, the main -springs serve to return the two cranks e and 12, and the cam edge simply follows the crank pin 13 on its return movement until the cranks reach the limit of their rearward movement. And the further rearward movement of the pitmen 3 and 15 caused by the springs 52, 53, as has been set forth, is permitted Without interference by the return of the cam with its concentric portion adjacent the crank pin.

Having thus described my invention, What l claim is:

1. The combination of a pitman, an actuating shaft, a handle carried by said shaft, an arm on said shaft, a bar pivoted to said arm, a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman onv rapid pull of the handle, a main shaft, a crank on the main shaft carrying a crank pin, the pitman having a slotted end engaging said pin for short limited movement of the pitman independent of the crank, a plate, a connection between the plate and said bar comprising a pin on one member engaging a. short slot in the other member, a main spring connected ljietween said plate and the machine whereby the initial advance of the handle and bar will ruse movement of the pitinan through said spring connection with the bar, but said plate will not at such stage advance to tension the main spring until said connection pin has advanced in the slot, and a spring between said plate and bar that will serve to return the bar and handle at the latter part of the return stroke after the main spring has retracted said plate.

2. The combination of a pitman, an actuating shaft, a handle carried by said shaft, an arm on said shaft, a bar pivoted to said arm, a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman on rapid pull of the handle, a

main shaft, a crank on the. main shaft carrying a crank pin, the pitman having a slotted end engaging said pin for short limited movement of the pitman independent of the crank, a. plate, a connection between the plate and said bar comprising a pin on one member engaging a short slot in the other member, a main spring connected between said plate and the machine whereby the initial advance of the handle and bar will cause movement of the pitman through said spring connection with the bar, but said plate will not at such stage advance to tension the main spring until said connection pin has advanced in the slot, a spring between said plate and bar that will serve to return the bar and handle at the latter part of the return stroke after the main spring has retracted said plate, and a latch member for the handle and bar arranged to lock them in the fully advanced position upon retarded advance of the pitman, until the pitman makes the full advance stroke, whereupon such latch is released.

3. The combination of a pitman, an actuating shaft, a handle carried by said shaft,

an arm on said shaft, a bar pivoted to said arm, a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman on rapid pull of the handle, a main shaft, a cra-nk on the main shaft carrying a crank pin, the pitman having a slotted end engaging said pin for short limited movement of the pitman independent of the crank, a plate, a connection between the plate and said bar comprising a pin on one member engl ging a short slot in the other member, a main spring connected between said plate and the machine whereby the initial advance of the handle and bar will cause movement of the pitman through Said spring connection with the bar, but 'said plate will not at such stage advance to tension the main spring until saidconnection pin has advanced in the slot, and a spring between said plate and bar that will serve to'return the bar and handle at the latter )art of the return stroke after the main spring has retracted said plate, said plate having a slotted portion engaging said crank'pin and no1-mall)T held against the same by the main springs.

4. The combination of a pitman, an actuating shaft, a handle carried by said shaft. an arm on said shaft, a bar pivoted to said arm, a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman on rapid pull of the handle, a main shaft, a crank on the main shaft carrying a crank pin, the pitman having a slotted end engaging said pin for short limited movement of the pitman independent of the crank, a plate` a connection between the plate and said bar comprising a pin on one member engaging a short slot in the other member, a main spring connected between said plate and the machine whereby the initial advance of the handle and bar will cause movement of the pitman through said spring connection with the barl` but said plate will not at such stage advance to tension the main spring until said connection pin has advanced in the slot, a spring between said plate and bar that will serve to return the bar and handle at the latter part of the return stroke after the main spring has retracted said plate, and a control device connected with the. said main shaft ar- 5. The combination of apitman, an actuating shaft, a handle carried by said shaft, an arm, on saidshaft, a .bar pivoted to said arm. a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman on rapid pull of the handle, a main shaft, a crank on the main shaft carrying a crank pin, the pitman having a slotted end engaging said pin for short limited movemento the pitman independent of the crank, a plate, a connection between the plate and said bar comprising a pin on one member engaging a short slot in the other member, a main spring connected between saidl plate and the machine whereby the initial advance of the handle and bar will cause movement of the pitman through said spring connection with the bar, but said plate will not at such stage advance to tension the main spring until said connection pin has advanced in the slot, a. spring between said plate and bar that will serve to return the bar and handle at the latter part of the return stroke after the main spring has retracted said plate, and means connected with said main shaft to prevent vibration thereof during its entire movement by the pitman.

(3. The combination of a pitman, an actuating shait, a handle carried by said shaft, an arm on said shaft, a bar pivoted to said arm. a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman on rapid pull of the handle, a main Shaft.l a crank on the main shaft carrying a crank pin, the pitman having 'a slotted end engaging said pin for short limited movement of the pitman independent of the crank, a plate, a connection between the plate and said bar comprising a pin on one member Iengaging a short slot in the other member, a main spring connected between said plate and the machine whereby the initial advance of the handle and bar will cause movement of the pitman through said spring connection with the bar, but said plate will not at such stage advance to tension the main spring until said connection pin has advanced in the slot, a spring between said plate and bar that will serve to return the bar and handle at the latter part of the return stroke after the main spring has retracted said plate. and a cam member that is actuated from the movement of the pitman,` said member being connected with the main shaft and arranged to prevent movement of such shaft during said initial advance of the pitman, and arranged to prevent oscillation of the main shaft during its movement from the pitman.

7. The combination of a pitman, an actuating shaft, a handle carried by said shaft, an arm on said shaft, a. bar pivoted to said arm, a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman on rapid pull of the handle, a main shaft, a universal bar actuated thereby, rack and type plates en gaging the universal bar, springs for elevating the rack and type plates when the universal bar is raised, a crank on the latter shaft carrying a pin, the pitman having a slotted end engaging said crank pin for short limited movement of the pitlnan independent of the crank, a plate, a connection between the plate and said bar comprising a pin on one member engaging a short slot in the other member, a main spring connected between said plate and the machine whereby the initial advance of the handle and bar will cause movement of the pitman through said spring connection with the bar, the main spring having power to retract the pitman and universal bar against the force of said rack and type plate springs, but said plate will not at such stage advance to tension the main spring until said connection pin has advanced in the slot, a spring between said plate and bar that will serve to return the bar and handle at the latter part` of the return stroke after the main spring has retracted said plate, and means connected with said universal bar shaft to prevent vibration thereof during its entire n'iovement by the pitman.

S. 'The combination of a pitman, an actuating shaft, a handle carried by said shaft., an arm on said shaft, a bar pivotcd to said arm, a spring connecting said bar with said pitman to normally advance the pitman by the handle and permitting retarded advance of the pitman on rapid pull of the handle, a main shaft, a universal bar actuated thereby, rack and type plates engaging the universal bar` springs for elevating the rack and type plates when the universal bar is raised, a crank on the latter shaft carrying a pin, the pitman having a slotted end engaging said crank pin for short limited movement of the pitman independent of the crank, a plate, a. connection between the plate and said bar comprising a pin on one member engagiug' a. short slot in the other member, a main spring connected between said plate and the machine whereby the initial advance of the handle and bar will cause movement of the pitman through said spring connection with the bar, the main spring having powerto retract the pitman and universal bar against the force of said rack and type plate springs, but said plate will not at such stage advance to tension the main spring until said c mnection pin has advanced in the slot` a spring between said plate and bar that will serve to return the bar and handle at the latter part of the return stroke after the main spring has retracted said plate, and a cam member that is actuate( from4 the movement of the pitman, said member beinglconnected with the main shaft and arranged to prevent movement of such shaft during Asaid initial advance of the pitman, and also arranged to prevent oscilla tion of the main shaft during its n'iovement from the pitman.

9. The combination of a pitman, a prime mover arranged to reciprocate the pitman, a power shaft connected with the pitman to be operated thereby whereby the pitman receives an initial movement before the shaft is advanced thereby, and the shaft is returned to normal position before the pitman makes its final movement, and a cam member actuated from movement ofthe pitman and arranged to prevent movement of the power shaft during the said independent movement of the pitman relative to the shaft.

10. The combination of a pitman, a prime mover arranged to reciprocate the pitman, a power shaft connected with the pitman to be operated thereby whereby the pitman receives an initial movement before the shaft is advanced thereby, and the shaft is returned to normal position before the pitman makes its final movement, and a cam -member actuated from movement of the pitman and arranged to prevent movement of the power shaft during the said independent movement of the pitman relative to the shaft, and to prevent vibration of the shaft during its movement by the pitman.

11. The combination of a pitman, a prime` mover arranged to reciprocate the pitman, a power shaft connected with' the pitman to be operated thereby whereby the pitman receives an initial movement before the shaft is advanced thereby, and the shaft is returned to normal position before the pitman makes its final movement, and meansl connected with the power shaft to prevent vibration thereof during the entire movement of the pitman.

12. The combination of a pitman, a prime mover arranged to reciprocate the pitman, a main shaft, means connecting the main shaft and the pitman whereby the pitman is given an initial advance from normal position before movement of the shaft, and also the pitman is given additional movement after return of the shaft to norn'lal position, a universal bar connected with the shaft, rack and type plates engaged by the universal bar, springs for the rack and type plates that elevate the plates when the universal bar is advanced, a main spring connected with the pitman and arranged to over-balance the said rack and type plate springs, and means connected with the main shaft for preventing vibration thereof by said two springs during its entire move` ment.

13. The combination of a pitman, a prime mover arranged to reciprocate the pitman, a main shaft, means connecting the main lll) shaft and the pitman whereby the pitman is given an initial advance from normal position before movement of the shaft, and also the pitman is given additional movement after return of the shaft to normal position, a universal bar connected with the shaft, rack and type, plates engaged by the universal bar, springs for the rack and type plates that elevate theV plates when the universal bar is advanced, a main' spring connected with the pitman and arranged to over-balance the said rack and ty e plate springs, and a cam member actuated from the pitman and connected with the said shaft to prevent vibration of the shaft by said springs.

14. The combination of a pitman, a prime mover arranged to reciprocate the pitman, a main shaft, means connecting the main shaft and the pitman whereby the pitman is -ven an initial advance from normal position before movement of the shaft, and also the pit-man is given additional movement after return of the shaft to normal position, a universal bar connected. with the shaft, rack and type plates engaged by the universal bar, springs for the rack and type plates that elevate the plates when the universal bar is advanced, a main spring connected with the pitman and arranged to over-balance the said rack and type plate springs, and a cam member actuated from the pitman and connected with the said shaft to prevent vibration of the shaft by said springs, and also arranged to prevent movement of the shaft during said additional movement of the itman.

15. The combination o a pitman, a prime mover arranged to reciprocate the pitman, a power shaft connected with the pitman to be operated thereby whereby the pitman receives an initial movement before the shaft is advanced thereby, and the shaft is returned 'to normal position before the pitman makesits final movement, and a control device connected with the power shaft arranged to prevent movement thereof during said initial and final independent movement of the pitman.

16. The combination of ,an actuating shaft, a handle carried by the shaft, a shoulder connected with the actuating shaft, a main operating shaft, a flexible connection between said shafts permitting retarded advance of the operating shaft by the actuatino shaft and handle, a latch device for holding the actuating shaft and handle in advanced position on retarded movement of the main shaft until the main shaft has completed its advance, said device comprising a pivoted lever, a stop member arranged to hold the pivoted lever in normal position, a pawl pivoted on said lever in position to engage said shoulder upon full advance of the actuating handle and shaft, said pawl being positioned on its lever wherebyI a line joining the axis of the pawl and its lever will extend in proximity to -the contact of the pawl and shoulder when advanced, whereby to retain these parts in position to lock the shoulder and handle advanced while the said stop member retains the lever in normal position, and means for releasing the lever from the stop member u'on the operating shaft completing its a vanced movement, whereby the lever and pawl will shift to release the shoulder and actuating shaft.

17. The combination of an actuating shaft, a handle carried by the shaft, a shoulder connected with the actuating shaft, a main operatin shaft, a. flexible connection between saidls .afts permitting retarded advance of the operating shaft by the actuating shaft and handle, a latch device for holding the actuating shaft and handle in advanced position on retarded movement of the main shaft until the main shaft has completed its advance, said device comprising a pivoted lever, a stop member arranged to hold the pivoted lever in normal position, a pawl pivoted on said lever in position to engage said shoulder upon full advance of the actuating handle and shaft, said pa'wl being positioned on its lever whereby a line joining the axis of the pawl and its lever will extend in proximity to the contact of the pawl and shoulder when advanced, whereby to retain these parts in position to lock the shoulder and handle advanced while the said stop member retains the le.- ver in normal position, said stop member' comprising a pivoted lever, and a stop connected with the operating member arranged to engage and shift said last mentioned lever at the conclusion of the advance of the operating member.

18. The combination of an operating member. an actuating bar, a main shaft having a limited loose connection with said operating member, a plate having a limited loose connection with said bar, a main spring! connect-ed between said plate and the machine, a spring of less tension than the main spring connecting the bar and operating member, and a spring between said plate and ba r of less tension than either of said springs.

19. The combination of an operating inember, an actuating bar having a limited loose connection with the operating member, a main shaft having a limited loose connection with said operating member, a plate having a limited loose connection with said bar, 1 main spring connected between said plate and the machine, a spring of less tension than the main spring connecting the bar and operating member, and a spring between said plate and bar of less tension than either of said springs.

20. The combination of an operating member, an actuating bar having a limited loose connection with the operating member, a main shaft having a limited loose comiection with said operating member, a. plate having a limited loose connection with said bar and also a limited loose connection with said shaft, a main spring connected between said pla-te andthe machine, a spring of less tension than-the main spring'connecting the bar and operating member, and a spring between said plate and bar of less tension than either of said springs.

21. The combination of a pitman, an actuating bar having a limited loose connection with the pitman, a main shaft, a crank on the shaft having a limited loose connection with the pitman, a plate having a limited loose connection with said bar and also with said crank, a main spring connected between said plate and the machine, a spring of less tension than the main spring connecting the bar and pitman, and a spring between said plate and bar of less tension than either of said springs.

22. The combination with a main shaft, a. universal bar actuated thereby, rack plates engaging the universal bar, and springs for elevating the rack plates When the universal bar is raised, of a crank on said shaft, a pitman having a limited loose connection with said crank, an actuating bar, a plate having a limited loose connection With said bar and also with said crank, a main spring connected between said plate and the frame, the main spring being tensioned to retract the pitman and universal bar against the tension of said rack plate springs, a spring of less tension than the main spring connecting the bar and pitman, and a spring between said plate and bar of less tension than either of said springs.

23. The combination of an operating member, an actuating bar, a main shaft having a limited loose connection with said operating member, a plate having a limited loose connection with said bar, a main spring connected between said plate and the machine, a spring of less tension than the main spring connecting the bar and operating lncmber, a spring between said plate and bar of less tension than either of said springs, and a latch member for the actuating bar arranged to lock it in the fully advanced position upon retarded advance of the operating member until the operating member makes the full.

advance stroke, whereupon such latch is released.

24. The combination with a main shaft, a universal bar actuated thereby, rack plates engaging the universal bar, and springs for elevating therack plates when the universal bar is raised, of a crank on said shaft, a

pitman having a limited loose connection with said crank, an actuatingbar, a plate having a limited loose connection with said bar and also with said crank, amain spring connected between said plate and the frame, the main spring being tensioned to retract the pitman and universal bar against the tension of said rack plate springs,fa. spring of less tension than the main spring connecting the bar and pitman, a spring between said plate andbar of less tension than either of said springs, and a control device connected with the said shaft arranged to prevent advance thereof during said initial movement of the handle and pitman.

25. The combination with a main shaft, a universal bar actuated thereby, rack plates engaging the universal bar, and springs for elevating the rack pla-tes when the universal bar is raised, of acrank on said shaft, a pitman having a limited loose connection with said crank, an actuating bar, a plate having a limited loose connection with said bar and also with said crank, a main spring connected between said plate and the frame, the main spring being tensioned to retract the pitman and universal bar against the tension of said rack plate springs, a. spring of less tension than the main spring connecting the bar and pitman, a spring between said plate and bar of less tension than either of said sprin and means connected with said universalgbar sha-ft to prevent vibration thereof. during its entire movement by the pitman.

26. The combination with a main shaft, a universal bar actuated thereby, rack plates engaging the universal bar, and springs for elevating the rack plates when the universal bar is raised, of a crank on said shaft, a, pitman having a limited loose connection with said crank, an actuating bar, a plate having a limited loose connection with said bar and also with said crank, a main spring connected between said plate and the frame, the main spring being tensioned to retract the pitma-n and universal bar against the tension of said rack plate springs, a spring of less tension than the main spring connecting the bar and pitman, a spring between said plate and bar of less tension than either of said springs, and a cam member that is actuated from the movement of the pitman, said cam member being connected with the said shaft and arranged to prevent movement of such shaft during said initial advance of of the pitman, and arranged to prevent oscillation of the shaft during its movement from the pitman.

WTSEL R. DE CAMP.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. C. 

